Frak!

Frak! is an arcade platform game developed by Aardvark Software. You play as Trogg the caveman, climbing ladders and jumping across platforms to collect gems for points and light bulbs for extra time.

Each level requires Trogg to collect all the keys, sometimes in a specific sequence. Statues block the way and must be removed using Trogg's yoyo, while balloons rise from below and daggers fly diagonally downward from above. Levels are approximately three screens wide and scroll as Trogg moves, while the Acorn Electron version flips between screens instead.

The game was released for the Acorn Electron, BBC Microcomputer System, Commodore C64/128/MAX, Linux, Mac, and PC running Microsoft Windows.